I've owed apogee divas with the active Dax for 30 years. They perform beautifully. About 7 years ago I developed a frequency-specific buzz along the top edge of a woofer ribbon. I decided to go with Graz ribbons for both speakers, along with a complete refurbishment of guts and wires by Bill Thalman at Music Tech in VA. He does a fabulous job - the speakers retained all their quality characteristics, with more extended bass, and dynamic range. Timbers and imaging is second to none. Bottom line, it was the best value decision I've made, rather than purchase something more expensive with inferior musicality. Believe me- I checked out many replacement options!! It is worth buying the best you can and maintaining them. New front end equipment (Rossini DAC, D'Agostino amps, ARC preamp) has improved the sound substantially and impressively - old speakers do more that "keep up" - they expose improvements and deficiencies truthfully. Everything needs maintenance or repair occasionally but can last many years of frequent use. In my 60s now I hope to keep these till I give out, hopefully decades from now. If I need to downsize I will very reluctantly, but it would be at the loss of my beloved Divas! Hope this perspective helps.